CN102926828A - Tappet and full variable valve stroke mechanism using same - Google Patents
Tappet and full variable valve stroke mechanism using same Download PDFInfo
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- CN102926828A CN102926828A CN2012105018426A CN201210501842A CN102926828A CN 102926828 A CN102926828 A CN 102926828A CN 2012105018426 A CN2012105018426 A CN 2012105018426A CN 201210501842 A CN201210501842 A CN 201210501842A CN 102926828 A CN102926828 A CN 102926828A
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Abstract
The invention discloses a tappet and a full variable valve stroke mechanism using the same. The tappet is characterized in that an elastic assembly is arranged between a base of the tappet and an adjusting piston, a tappet cover covers the adjusting piston, an adjusting cam is arranged between the tappet cover and the adjusting piston, and the tappet cover of the tappet is directly or indirectly contacted with an air valve. Compared with the prior art, the length of the tappet provided by the invention can be adjusted according to actual requirements, and the variable valve stroke mechanism can realize full-continuous control.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to a kind of tappet and variable air valve lift range mechanism.
Background technique
Traditional petrolic valve lift is fixing immutable.Namely the cam profile of engine cam only has a kind of.This has just caused this lift can not make motor all obtain best inlet stream value in high load region and low load region, obtains good power character and Economy.The valve lift of conventional gasoline machine motor---design of cam contour line be to motor under full operating mode, select according to the balance of comprehensive evaluation index.Motor or satisfy the best fuel consumption rate of low-load consequently, or satisfy the output torque of the best of high load, you can't have both at the same time.
The employing of variable air valve lift range mechanism makes motor can both be met the valve lift of demand at high load region and low load region.Thereby improve power character and the Economy of motor in full condition range.Existing variable air valve lift range mechanism, major part can only be realized 2 sections or 3 sections adjustings, can not realize continuous adjusting, and the engine combustion scheme is limited to by this.
Summary of the invention
Given this, the object of the invention is to provide a kind of variable air valve lift range mechanism that can realize that continuous control is regulated, and simultaneously, the present invention also provides length-adjustable tappet, and described tappet is the important spare part of described variable air valve lift range mechanism.
For solving above technical problem, technological scheme provided by the invention is, a kind of tappet is provided, base and adjust between the piston and be provided with elastic component, and tappet covers the adjustment piston, and the tappet lid is the adjustment cam with adjusting between the piston.
Preferably, described elastic component is spring.
The present invention also provides a kind of full variable air valve lift range mechanism that comprises above-mentioned tappet, and the tappet lid of described tappet directly or indirectly contacts with valve.
Preferably, described tappet and valve are positioned at the same side of rocking arm, and lay respectively at the two ends of rocking arm, and engine cam is at the opposite side of rocking arm; The tappet lid of tappet is hinged with rocking arm.
Further, described adjustment cam is fastenedly connected with adjusting camshaft, and an end of described adjustment camshaft is fixedly connected with drive plate, and adjusts camshaft perpendicular to drive plate, the piston rod of the fringe region connection for transmission oil cylinder of drive plate is on the cylinder body end articulated frame of transmission oil cylinder.
Further, the oil-feed of described transmission oil cylinder and fuel-displacedly controlled by the electromagnetic control fuel tap.
Further, described electromagnetic control fuel tap divides Electromagnetic Control section and oil circuit control device, and described oil circuit control device is divided into oily section and fuel-displaced section of oil-feed section, control successively, be provided with sealed seat surface between the adjacent both ends, the oil-feed section is provided with oil inlet hole, and control oil section is provided with the control oilhole, and fuel-displaced section is provided with oil outlet; In the oil-feed section oiling valve is installed, outlet valve is installed in fuel-displaced section, described oiling valve is fixedly connected with by connecting rod with described outlet valve, and there is a push rod in described Electromagnetic Control section, described push rod outlet valve contact.
Further, the filler opening of described control oilhole and transmission oil cylinder is by pipeline communication, and the oil outlet of transmission oil cylinder is communicated with the control oilhole by another pipeline.
Preferably, in the described oil-feed section return spring is installed also.
Compared with prior art, the length of tappet of the present invention can be adjusted according to actual needs, and makes variable air valve lift range mechanism realize full continuous control.When engine cam is in the basic circle position, adjust cam and turn to the maximum height place, guarantee the spring-compressed of tappet to minimum position, namely holding out almost to be in is rigidly connected, and guarantee that valve is in closed condition this moment.When the adjustment cam turned to minimum constructive height, the tappet spring extended to overcome the gap between base and the adjustment piston, and this moment, valve still was in closed condition.So just can guarantee how no matter adjust cam rotates, and valve all can normally be closed.
When engine cam is rotated to maximum lift position by basic circle, by rotating the position of adjusting cam, then can realize the variation of tappet length, thereby realize the adjustment function of valve lift.
The rotation angle of adjusting cam has determined the variation of valve added lift, will adjust camshaft and be connected with drive plate, by being connected to the outside drive piston motion on the drive plate, control the angle that drive plate rotates, thereby the rotation angle of cam is adjusted in control.Wherein, the stroke of transmission oil cylinder piston is decided by oil inlet quantity and the recirculating oil quantity of transmission oil cylinder.The moment of its oil-feed and oil return and oil mass size are controlled by the electromagnetic control fuel tap.In the unregulated situation of valve added lift, the electromagnetic control fuel tap is not worked; In the time of only need adjusting the valve added lift, the electromagnetic control fuel tap is just worked, and it is in running order to have avoided the electromagnetic control fuel tap all to need in each circulation, thus all not too high to switching requirement and the response characteristic of electromagnetic control fuel tap, realize than being easier to.
Description of drawings
Fig. 1 is prop column structure schematic representation among the embodiment 1.
Fig. 2 is full variable lift valve operating mechanism structure schematic representation among the embodiment 2.
Fig. 3 adjusts the cam drive mechanism schematic representation among the embodiment 2.
Fig. 4 is electromagnetic control fuel tap structural representation among the embodiment 2.
Embodiment
Describe below in conjunction with accompanying drawing and specific embodiment.
Referring to Fig. 1.The described tappet of present embodiment is made of base 11, adjustment piston 12, tappet lid 13, adjustment cam 14 and elastic component 16.Base 11 can be fixed on the frame, or is fixed on the rocking arm.Be provided with elastic component 16 between base 11 and the adjustment piston 12, tappet lid 13 covers adjusts piston 12, is to adjust cam 14 between tappet lid 13 and the adjustment piston 12.Present embodiment Elastic assembly 16 is spring.
Embodiment 2
Referring to Fig. 2 to Fig. 4.The described full variable air valve lift range mechanism of present embodiment comprises embodiment's 1 described tappet.The tappet lid 13 of described tappet 1 passes through the Rocker arm 4 mediate contact with valve 6.That is to say that tappet 1 and valve 6 are positioned at the same side of Rocker arm 4, and lay respectively at the two ends of Rocker arm 4, engine cam 5 is at the opposite side of Rocker arm 4; The tappet lid 13 of tappet 1 is hinged with Rocker arm 4.
The adjustment cam 14 of each cylinder is adjusted camshaft 15 by one and is fastenedly connected, an end of adjusting camshaft 15 is fixedly connected with drive plate 2, and adjust camshaft 15 perpendicular to drive plate 2, the piston rod 32 of the fringe region connection for transmission oil cylinder 3 of drive plate 2 is on cylinder body end 33 articulated frames of transmission oil cylinder 3.Drive plate 2 can be circular or direction or oval or bar shaped.When the piston rod 32 of transmission oil cylinder stretches, promote drive plate 2, it is rotated around adjusting camshaft 15 tie point with drive plate 2.And the oil-feed of transmission oil cylinder 3 and fuel-displaced be to be controlled by electromagnetic control fuel tap 31.31 minutes Electromagnetic Control sections of electromagnetic control fuel tap and two parts of oil circuit control device.The oil circuit control device is divided into oily section and fuel-displaced section of oil-feed section, control successively, is provided with sealed seat surface between the adjacent both ends.The oil-feed section is provided with oil inlet hole 311, and control oil section is provided with control oilhole 312, and fuel-displaced section is provided with oil outlet 313.Oiling valve 315 and return spring 317 are installed in the oil-feed section.When the sealed seat surface between oiling valve 315 and oil-feed section, the control oil section was fitted, the oil-feed section was cut off fully with control oil section, and control oilhole 312 is communicated with oily passage of formation with oil outlet 313.Outlet valve 316 is installed in fuel-displaced section, outlet valve 316 and control oil section, when the sealed seat surface between fuel-displaced section is fitted, control oil section and fuel-displaced section are separated fully, and oil inlet hole 311 and control oilhole 312 are communicated with oily passage of formation.Above-mentioned oiling valve 315 and described outlet valve 316 are fixedly connected with by connecting rod, and the length of this connecting rod is greater than the distance of two sealed seat surfaces, more precisely, be oiling valve 315 and outlet valve 316 at a time can only with two sealed seat surfaces in an applying.
During the electromagnet coil power of Electromagnetic Control section, the electromagnetic force that armature produces makes oiling valve 315 and outlet valve 316 together to left movement by push rod, until outlet valve 316 is close to its sealed seat surface, at this moment, oil outlet 313 is closed, oil inlet hole 311 is opened, and machine oil enters control oilhole 312 by oil inlet hole 311, and the filler opening 34 by the transmission oil cylinder enters cylinder body again, promote hydraulic piston, piston rod rises; When electromagnet cuts off the power supply, oiling valve 315 and outlet valve 316 are under the effect of hydraulic coupling and return spring 317, move right, oiling valve 315 is close to its sealed seat surface, at this moment, oil inlet hole 311 is closed, and oil outlet 313 is opened, the machine oil of transmission oil cylinder is got back to oil outlet 313 from oil outlet 35 by control oilhole 312 and is entered engine sump tank, the hydraulic piston return.
The machine oil of full variable air valve lift range mechanism derives from engine sump tank, the power source of oil hydraulic pump is bent axle, when electronic control unit is rotating speed and the throttle position signal that ECU obtains the motor operation, determine the residing operating mode of motor, the dependence interpolation of tabling look-up is obtained the moment that the electromagnetic control fuel tap opens and is opened the endurance by the inner MAP data of ECU.If this moment, the electromagnetic control fuel tap was failure to actuate, the machine oil that oil hydraulic pump pumps from oil sump does not enter transmission oil cylinder 3 through the electromagnetic control fuel tap, directly gets back to oil sump; If this moment, variable valve system needs work, determines electromagnetic control fuel tap start-up time and unlatching endurance according to ECU, and the machine oil that is then pumped by oil hydraulic pump enters transmission oil cylinder 3 through the electromagnetic control fuel tap, finishes the adjustment to tappet length.Wherein the electromagnetic control fuel tap control signal that obtains according to inner MAP data lookup table interpolation of ECU determine the electromagnetic control fuel tap energising constantly and the energising endurance, and then determine that machine oil enters the moment and the oil inlet quantity of transmission oil cylinder 3.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with the claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a tappet is characterized in that, is provided with elastic component (16) between base (11) and the adjustment piston (12), and tappet lid (13) covers adjusts piston (12), is to adjust cam (14) between tappet lid (13) and the adjustment piston (12).
2. tappet according to claim 1 is characterized in that, described elastic component (16) is spring.
3. a full variable air valve lift range mechanism that comprises claim 1 or 2 described tappets is characterized in that, the tappet lid (13) of described tappet (1) directly or indirectly contacts with valve (6).
4. full variable air valve lift range mechanism according to claim 3 is characterized in that, described tappet (1) and valve (6) are positioned at the same side of rocking arm (4), and lay respectively at the two ends of rocking arm (4), and engine cam (5) is at the opposite side of rocking arm (4); The tappet lid (13) of tappet (1) is hinged with rocking arm (4).
5. full variable air valve lift range mechanism according to claim 3, it is characterized in that, described adjustment cam (14) is fastenedly connected with adjustment camshaft (15), one end of described adjustment camshaft (15) is fixedly connected with drive plate (2), and adjust camshaft (15) perpendicular to drive plate (2), the piston rod (32) of the fringe region connection for transmission oil cylinder (3) of drive plate (2) is on cylinder body end (33) articulated frame of transmission oil cylinder (3).
6. full variable air valve lift range mechanism according to claim 5 is characterized in that, the oil-feed of described transmission oil cylinder (3) and fuel-displacedly controlled by electromagnetic control fuel tap (31).
7. full variable air valve lift range mechanism according to claim 6, it is characterized in that, described electromagnetic control fuel tap (31) minute Electromagnetic Control section and oil circuit control device, described oil circuit control device is divided into oily section and fuel-displaced section of oil-feed section, control successively, be provided with sealed seat surface between the adjacent both ends, the oil-feed section is provided with oil inlet hole (311), and control oil section is provided with control oilhole (312), and fuel-displaced section is provided with oil outlet (313); Oiling valve (315) is installed in the oil-feed section, outlet valve (316) is installed in fuel-displaced section, described oiling valve (315) is fixedly connected with by connecting rod with described outlet valve (316), and there is a push rod (314) in described Electromagnetic Control section, described push rod (314) outlet valve (316) contact.
8. full variable air valve lift range mechanism according to claim 7, it is characterized in that, described control oilhole (312) passes through pipeline communication with the filler opening (34) of transmission oil cylinder (3), and the oil outlet (35) of transmission oil cylinder (3) is communicated with control oilhole (312) by another pipeline.
9. full variable air valve lift range mechanism according to claim 7 is characterized in that, return spring (317) also is installed in the described oil-feed section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210501842.6A CN102926828B (en) | 2012-11-30 | 2012-11-30 | Full variable valve stroke mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210501842.6A CN102926828B (en) | 2012-11-30 | 2012-11-30 | Full variable valve stroke mechanism |
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| CN102926828A true CN102926828A (en) | 2013-02-13 |
| CN102926828B CN102926828B (en) | 2015-03-18 |
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| CN201210501842.6A Active CN102926828B (en) | 2012-11-30 | 2012-11-30 | Full variable valve stroke mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545401A (en) * | 2015-12-14 | 2016-05-04 | 中国北方发动机研究所(天津) | Valve timing adjusting device for double overhead camshaft of high-speed diesel engine |
| CN106988818A (en) * | 2017-06-09 | 2017-07-28 | 西华大学 | A kind of variable tappet |
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| GB2066403A (en) * | 1979-12-21 | 1981-07-08 | Thomson A J | Floating pivot rocker arm |
| US6945204B2 (en) * | 2003-11-12 | 2005-09-20 | General Motors Corporation | Engine valve actuator assembly |
| CN1900491A (en) * | 2006-07-20 | 2007-01-24 | 姬腾飞 | Timing and lift continuous changeable device for engine air valve |
| US7325522B2 (en) * | 2004-10-02 | 2008-02-05 | Schaeffler Kg | Valve drive for a cam-operated valve |
| CN101144400A (en) * | 2006-09-11 | 2008-03-19 | 现代自动车株式会社 | Variable valve lift device |
| CN101305164A (en) * | 2005-11-10 | 2008-11-12 | 谢夫勒两合公司 | Valve gear of an internal combustion engine |
| CN101503973A (en) * | 2009-03-27 | 2009-08-12 | 奇瑞汽车股份有限公司 | Air valve lift adjustable engine valve actuating mechanism |
| US8033260B2 (en) * | 2008-02-07 | 2011-10-11 | Meta Motoren- Und Energie- Technik Gmbh | Valve lever assembly having a switchable valve actuating mechanism |
| CN203008980U (en) * | 2012-11-30 | 2013-06-19 | 西华大学 | Tappet and fully variable air valve lift mechanism adopting tappet |
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2012
- 2012-11-30 CN CN201210501842.6A patent/CN102926828B/en active Active
Patent Citations (9)
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| GB2066403A (en) * | 1979-12-21 | 1981-07-08 | Thomson A J | Floating pivot rocker arm |
| US6945204B2 (en) * | 2003-11-12 | 2005-09-20 | General Motors Corporation | Engine valve actuator assembly |
| US7325522B2 (en) * | 2004-10-02 | 2008-02-05 | Schaeffler Kg | Valve drive for a cam-operated valve |
| CN101305164A (en) * | 2005-11-10 | 2008-11-12 | 谢夫勒两合公司 | Valve gear of an internal combustion engine |
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| CN101144400A (en) * | 2006-09-11 | 2008-03-19 | 现代自动车株式会社 | Variable valve lift device |
| US8033260B2 (en) * | 2008-02-07 | 2011-10-11 | Meta Motoren- Und Energie- Technik Gmbh | Valve lever assembly having a switchable valve actuating mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545401A (en) * | 2015-12-14 | 2016-05-04 | 中国北方发动机研究所(天津) | Valve timing adjusting device for double overhead camshaft of high-speed diesel engine |
| CN105545401B (en) * | 2015-12-14 | 2018-03-02 | 中国北方发动机研究所(天津) | A kind of high-speed diesel engine Dual Over Head Camshaft timing adjusting device |
| CN106988818A (en) * | 2017-06-09 | 2017-07-28 | 西华大学 | A kind of variable tappet |
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| CN102926828B (en) | 2015-03-18 |
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Effective date of registration: 20200526 Address after: No. 917, floor 9, building 1, No. 666, middle section of Tianfu Avenue, hi tech Zone, Chengdu, Sichuan 610000 Patentee after: Chengdu Feiqing Aviation Technology Co., Ltd Address before: 610039, No. 999, Jin Zhou road, Jinniu District, Sichuan, Chengdu Patentee before: XIHUA University |